spl: add initial support for a generic SPL framework
Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>utp
Daniel Schwierzeck
Wolfgang Denk
parent
4e0fbb98fc
commit
6a11cf48a5
39
README
39
README
|
|
@ -2255,6 +2255,45 @@ FIT uImage format:
|
|||
Adds the MTD partitioning infrastructure from the Linux
|
||||
kernel. Needed for UBI support.
|
||||
|
||||
- SPL framework
|
||||
CONFIG_SPL
|
||||
Enable building of SPL globally.
|
||||
|
||||
CONFIG_SPL_TEXT_BASE
|
||||
TEXT_BASE for linking the SPL binary.
|
||||
|
||||
CONFIG_SPL_LDSCRIPT
|
||||
LDSCRIPT for linking the SPL binary.
|
||||
|
||||
CONFIG_SPL_LIBCOMMON_SUPPORT
|
||||
Support for common/libcommon.o in SPL binary
|
||||
|
||||
CONFIG_SPL_LIBDISK_SUPPORT
|
||||
Support for disk/libdisk.o in SPL binary
|
||||
|
||||
CONFIG_SPL_I2C_SUPPORT
|
||||
Support for drivers/i2c/libi2c.o in SPL binary
|
||||
|
||||
CONFIG_SPL_GPIO_SUPPORT
|
||||
Support for drivers/gpio/libgpio.o in SPL binary
|
||||
|
||||
CONFIG_SPL_MMC_SUPPORT
|
||||
Support for drivers/mmc/libmmc.o in SPL binary
|
||||
|
||||
CONFIG_SPL_SERIAL_SUPPORT
|
||||
Support for drivers/serial/libserial.o in SPL binary
|
||||
|
||||
CONFIG_SPL_SPI_FLASH_SUPPORT
|
||||
Support for drivers/mtd/spi/libspi_flash.o in SPL binary
|
||||
|
||||
CONFIG_SPL_SPI_SUPPORT
|
||||
Support for drivers/spi/libspi.o in SPL binary
|
||||
|
||||
CONFIG_SPL_FAT_SUPPORT
|
||||
Support for fs/fat/libfat.o in SPL binary
|
||||
|
||||
CONFIG_SPL_LIBGENERIC_SUPPORT
|
||||
Support for lib/libgeneric.o in SPL binary
|
||||
|
||||
Modem Support:
|
||||
--------------
|
||||
|
|
|
|||
|
|
@ -0,0 +1,62 @@
|
|||
Generic SPL framework
|
||||
=====================
|
||||
|
||||
Overview
|
||||
--------
|
||||
|
||||
To unify all existing implementations for a secondary program loader (SPL)
|
||||
and to allow simply adding of new implementations this generic SPL framework
|
||||
has been created. With this framework almost all source files for a board
|
||||
can be reused. No code duplication or symlinking is necessary anymore.
|
||||
|
||||
|
||||
How it works
|
||||
------------
|
||||
|
||||
There is a new directory TOPDIR/spl which contains only a Makefile.
|
||||
The object files are built separately for SPL and placed in this directory.
|
||||
The final binaries which are generated are u-boot-spl, u-boot-spl.bin and
|
||||
u-boot-spl.map.
|
||||
|
||||
During the SPL build a variable named CONFIG_SPL_BUILD is exported
|
||||
in the make environment and also appended to CPPFLAGS with -DCONFIG_SPL_BUILD.
|
||||
Source files can therefore be compiled for SPL with different settings.
|
||||
ARM-based boards have previously used the option CONFIG_PRELOADER for it.
|
||||
|
||||
For example:
|
||||
|
||||
ifeq ($(CONFIG_SPL_BUILD),y)
|
||||
COBJS-y += board_spl.o
|
||||
else
|
||||
COBJS-y += board.o
|
||||
endif
|
||||
|
||||
COBJS-$(CONFIG_SPL_BUILD) += foo.o
|
||||
|
||||
#ifdef CONFIG_SPL_BUILD
|
||||
foo();
|
||||
#endif
|
||||
|
||||
|
||||
The building of SPL images can be with:
|
||||
|
||||
#define CONFIG_SPL
|
||||
|
||||
Because SPL images normally have a different text base, one have to be
|
||||
configured by defining CONFIG_SPL_TEXT_BASE. The linker script have to be
|
||||
defined with CONFIG_SPL_LDSCRIPT.
|
||||
|
||||
To support generic U-Boot libraries and drivers in the SPL binary one can
|
||||
optionally define CONFIG_SPL_XXX_SUPPORT. Currently following options
|
||||
are supported:
|
||||
|
||||
CONFIG_SPL_LIBCOMMON_SUPPORT (common/libcommon.o)
|
||||
CONFIG_SPL_LIBDISK_SUPPORT (disk/libdisk.o)
|
||||
CONFIG_SPL_I2C_SUPPORT (drivers/i2c/libi2c.o)
|
||||
CONFIG_SPL_GPIO_SUPPORT (drivers/gpio/libgpio.o)
|
||||
CONFIG_SPL_MMC_SUPPORT (drivers/mmc/libmmc.o)
|
||||
CONFIG_SPL_SERIAL_SUPPORT (drivers/serial/libserial.o)
|
||||
CONFIG_SPL_SPI_FLASH_SUPPORT (drivers/mtd/spi/libspi_flash.o)
|
||||
CONFIG_SPL_SPI_SUPPORT (drivers/spi/libspi.o)
|
||||
CONFIG_SPL_FAT_SUPPORT (fs/fat/libfat.o)
|
||||
CONFIG_SPL_LIBGENERIC_SUPPORT (lib/libgeneric.o)
|
||||
|
|
@ -0,0 +1,4 @@
|
|||
u-boot-spl
|
||||
u-boot-spl.bin
|
||||
u-boot-spl.lds
|
||||
u-boot-spl.map
|
||||
|
|
@ -0,0 +1,100 @@
|
|||
#
|
||||
# (C) Copyright 2000-2011
|
||||
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
||||
#
|
||||
# (C) Copyright 2011
|
||||
# Daniel Schwierzeck, daniel.schwierzeck@googlemail.com.
|
||||
#
|
||||
# (C) Copyright 2011
|
||||
# Texas Instruments Incorporated - http://www.ti.com/
|
||||
# Aneesh V <aneesh@ti.com>
|
||||
#
|
||||
# This file is released under the terms of GPL v2 and any later version.
|
||||
# See the file COPYING in the root directory of the source tree for details.
|
||||
#
|
||||
# Based on top-level Makefile.
|
||||
#
|
||||
|
||||
CONFIG_SPL_BUILD := y
|
||||
export CONFIG_SPL_BUILD
|
||||
|
||||
include $(TOPDIR)/config.mk
|
||||
|
||||
# We want the final binaries in this directory
|
||||
obj := $(OBJTREE)/spl/
|
||||
|
||||
HAVE_VENDOR_COMMON_LIB := $(shell [ -f $(SRCTREE)/board/$(VENDOR)/common/Makefile ] \
|
||||
&& echo y || echo n)
|
||||
|
||||
START := $(CPUDIR)/start.o
|
||||
|
||||
LIBS-y += arch/$(ARCH)/lib/lib$(ARCH).o
|
||||
LIBS-y += $(CPUDIR)/lib$(CPU).o
|
||||
ifdef SOC
|
||||
LIBS-y += $(CPUDIR)/$(SOC)/lib$(SOC).o
|
||||
endif
|
||||
LIBS-y += board/$(BOARDDIR)/lib$(BOARD).o
|
||||
LIBS-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/lib$(VENDOR).o
|
||||
|
||||
START := $(addprefix $(SPLTREE)/,$(START))
|
||||
LIBS := $(addprefix $(SPLTREE)/,$(sort $(LIBS-y)))
|
||||
|
||||
__START := $(subst $(obj),,$(START))
|
||||
__LIBS := $(subst $(obj),,$(LIBS))
|
||||
|
||||
# Linker Script
|
||||
ifdef CONFIG_SPL_LDSCRIPT
|
||||
# need to strip off double quotes
|
||||
LDSCRIPT := $(addprefix $(SRCTREE)/,$(subst ",,$(CONFIG_SPL_LDSCRIPT)))
|
||||
endif
|
||||
|
||||
ifeq ($(wildcard $(LDSCRIPT)),)
|
||||
LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-spl.lds
|
||||
endif
|
||||
ifeq ($(wildcard $(LDSCRIPT)),)
|
||||
LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-spl.lds
|
||||
endif
|
||||
ifeq ($(wildcard $(LDSCRIPT)),)
|
||||
$(error could not find linker script)
|
||||
endif
|
||||
|
||||
# Special flags for CPP when processing the linker script.
|
||||
# Pass the version down so we can handle backwards compatibility
|
||||
# on the fly.
|
||||
LDPPFLAGS += \
|
||||
-include $(TOPDIR)/include/u-boot/u-boot.lds.h \
|
||||
-include $(OBJTREE)/include/config.h \
|
||||
$(shell $(LD) --version | \
|
||||
sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
|
||||
|
||||
ALL-y += $(obj)u-boot-spl.bin
|
||||
|
||||
all: $(ALL-y)
|
||||
|
||||
$(obj)u-boot-spl.bin: $(obj)u-boot-spl
|
||||
$(OBJCOPY) $(OBJCFLAGS) -O binary $< $@
|
||||
|
||||
GEN_UBOOT = \
|
||||
UNDEF_SYM=`$(OBJDUMP) -x $(LIBS) | \
|
||||
sed -n -e 's/.*\($(SYM_PREFIX)__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`;\
|
||||
cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $$UNDEF_SYM $(__START) \
|
||||
--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \
|
||||
-Map u-boot-spl.map -o u-boot-spl
|
||||
|
||||
$(obj)u-boot-spl: depend $(START) $(LIBS) $(obj)u-boot-spl.lds
|
||||
$(GEN_UBOOT)
|
||||
|
||||
$(START): depend
|
||||
$(MAKE) -C $(SRCTREE)/$(CPUDIR) $@
|
||||
|
||||
$(LIBS): depend
|
||||
$(MAKE) -C $(SRCTREE)$(dir $(subst $(SPLTREE),,$@))
|
||||
|
||||
$(obj)u-boot-spl.lds: $(LDSCRIPT) depend
|
||||
$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - < $< > $@
|
||||
|
||||
depend: $(obj).depend
|
||||
.PHONY: depend
|
||||
|
||||
# defines $(obj).depend target
|
||||
include $(SRCTREE)/rules.mk
|
||||
Loading…
Reference in New Issue